Appleton's dictionary of machines, mechanics, engine-work, and engineering . to the foot, towards the front, to assist the tymp of the metal, which comes out through a shoulder cut in the lower face of the dam-stone. The cinder pours over the top of this last, Tlie for the tuyere, which was first a square opening left in the masonry, is generally filled up now (since the use of hot air especially) with a double hollow cone, called a water-tuyere, made of wrought-iron, of wrought-iron with a mixture of copper, or of cast-iron, and built in with fire-clay on the tuyere-shelf. Fig. 2349 is
Appleton's dictionary of machines, mechanics, engine-work, and engineering . to the foot, towards the front, to assist the tymp of the metal, which comes out through a shoulder cut in the lower face of the dam-stone. The cinder pours over the top of this last, Tlie for the tuyere, which was first a square opening left in the masonry, is generally filled up now (since the use of hot air especially) with a double hollow cone, called a water-tuyere, made of wrought-iron, of wrought-iron with a mixture of copper, or of cast-iron, and built in with fire-clay on the tuyere-shelf. Fig. 2349 is intended to show this utensil. The openings at a a are intended, the one to admit, the other to let out, the water which circulates in the tuyere, and preserves it from the action of the heat in the hearth. 2349- After stating the general prin-ciple that the hearth and boshesshould be of the most refractorymaterial possible, the choice ofthat material, of its position andtreatment, it is obvious, depends,within certain limits, upon cir-cumstances. Thus, they are builtof
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Keywords: ., bookcentury1800, booksubjectmechanicalengineering, bookyear1861
